Solution : https://service.sap.com/sap/support/notes/113182 (SAP Service marketplace login required)
Key words :
additional key words me59 uom meins bmein, activate variable order unit, source list item, source assignment function, prerequisites program error, order unit, convert unit, info record, system select, enter vendor
Related Notes :
| 339057 | Redesign quantty conversion:ME59 ignores order unit |